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4211 Rosniblett is a main-belt asteroid. The asteroid belt is the
region of the Solar System located roughly between the orbits of
the planets Mars and Jupiter. It is occupied by numerous
irregularly shaped bodies called asteroids or minor planets. The
asteroid belt is also termed the main asteroid belt or main belt
because there are other asteroids in the Solar System such as
near-Earth asteroids and trojan asteroids. Maybe half the mass of
the belt is contained in the four largest asteroids: 1 Ceres, 4
Vesta, 2 Pallas, and 10 Hygiea. These have mean diameters of more
than 400 km, while Ceres, the asteroid belt's only identified dwarf
planet, is about 950 km in diameter.